A superplastic bimodal grain-structured Mg–9Al–1Zn alloy processed by short-process hard-plate rolling

Zhang, Hongmin; Cheng, Xiu-Ming; Zha, Min; Li, Yongkang; Wang, Cheng; Yang, Zhi-Zheng; Wang, Jinguo; Wang, Huiyuan

doi:10.1016/j.mtla.2019.100443

Cited by 28 publications

(2 citation statements)

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“…As a general rule, this stage was also characterized by measurable strain hardening (followed perhaps by strain softening), and subsequent steady-state flow was typically attributed to the activation of the grain-boundary sliding [2][3][4][5][6][7][8][9]11,12,14,15,[20][21][22]25,28,35,[39][40][41][42]. A somewhat similar behavior has also been observed during superplasticity of bimodal grain structures [28,43,44]. In such instances, the coarse-grained constituent typically experiences continuous recrystallization whereas the finegrained one undergoes grain-boundary sliding.…”

Section: Introductionmentioning

confidence: 63%

EBSD study of superplasticity: New insight into a well-known phenomenon

Myshlyaev

Mironov

Korznikova

et al. 2022

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 63%

EBSD study of superplasticity: New insight into a well-known phenomenon

Myshlyaev

Mironov

Korznikova

et al. 2022

Journal of Alloys and Compounds

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“…The difference in grain size is because that there are more Mg 2 Sn particles with high thermal stability in AT82 compared with ATZ811. During the hot rolling and inter-pass annealing process, the Mg 17 Al 12 phases precipitate and dissolve repeatedly accompanied by softening and coarsening due to their low thermal stability [11,25], leading to a relatively poor effect on hindering grain growth. However, the presence of fine and homogeneously dispersed Mg 2 Sn precipitates along the grain boundaries can be quite beneficial to obtaining a fine-grain microstructure.…”

Section: Microstructural Characteristics Of As-rolled Materialsmentioning

confidence: 99%

Superplastic Deformation Behavior of Rolled Mg-8Al-2Sn and Mg-8Al-1Sn-1Zn Alloys at High Temperatures

et al. 2020

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The high-temperature superplastic deformation behavior of rolled Mg-8Al-2Sn (AT82) and Mg-8Al-1Sn-1Zn (ATZ811) alloys were investigated in this study. During tensile deformation at 573 K, no obvious grain growth occurred in both alloys, because of the high-volume fraction of second phases located at grain boundaries. Meanwhile, texture weakening was observed, suggesting that grain boundary sliding (GBS) is the dominant superplastic deformation mechanism, which agreed well with the strain rate sensitivity (m) and the activation energy (Q) calculations. The microstructural evolution during tensile deformation manifested that there were more and larger cavities in AT82 than ATZ811 during high-temperature tensile deformation. Therefore, superior superplasticity was found in the ATZ811 alloy that presented a tensile elongation of ~510% under a strain rate of 10−3 s−1 at 573 K, in contrast to the relatively inferior elongation of ~380% for the AT82 alloy. Meanwhile, good tensile properties at ambient temperature were also obtained in ATZ811 alloy, showing the ultimate tensile strength (UTS) of ~355 MPa, yield strength (YS) of ~250 MPa and elongation of ~18%. Excellent mechanical performance at both ambient and elevated temperatures can be realized by using economical elements and conventional rolling process, which is desirable for the industrial application of Mg alloy sheets.

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Heterostructured Metallic Structural Materials: Research Methods, Properties, and Future Perspectives

Dong,

Gao,

Xiao

et al. 2024

Adv Funct Materials

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Heterostructured (HS) materials, characterized by heterogeneous zones with differences in mechanical or physical properties, represent a revolutionary advancement in material science. During deformation, hetero‐deformation‐induced (HDI) stress forms due to the synergistic interactions between soft and hard zones, leading to remarkable HDI strengthening and strain hardening. This mechanism significantly enhances their performance, surpassing that of traditional homogeneous materials. This review delves into the classification, preparation techniques, fundamental deformation mechanisms, and research methods of HS materials. It outlines the preparation methods of various HS materials, emphasizing their unique characteristics and applications. The review elaborates on the fundamental deformation mechanisms of HS materials, focusing on non‐uniform plastic deformation behavior and HDI strain hardening. Furthermore, it explores the application of heterogeneous design concepts in materials, analyzing their microstructure tuning mechanisms and mechanical properties. This review aims to serve as a critical reference for the future design and development of new HS metallic structural materials, paving the way for innovations that can transform multiple industries. By highlighting the long‐term impact, this review not only enhances the understanding of HS materials but also provides a roadmap for future research and industrial applications, positioning HS materials as key players in the advancement of material technology.

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A superplastic bimodal grain-structured Mg–9Al–1Zn alloy processed by short-process hard-plate rolling

Cited by 28 publications

References 42 publications

EBSD study of superplasticity: New insight into a well-known phenomenon

EBSD study of superplasticity: New insight into a well-known phenomenon

Superplastic Deformation Behavior of Rolled Mg-8Al-2Sn and Mg-8Al-1Sn-1Zn Alloys at High Temperatures

Heterostructured Metallic Structural Materials: Research Methods, Properties, and Future Perspectives

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